CVE-2023-32257

Name: CVE-2023-32257
Creator: NVD / NIST
Published: 2023-07-24T16:15:11.68+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10EPSS 2.39%

Last modified Jun 17, 2026

CVE-2023-32257 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. A flaw was found in the Linux kernel's ksmbd, a high-performance in-kernel SMB server. The specific flaw exists within the processing of SMB2_SESSION_SETUP and SMB2_LOGOFF commands. EPSS estimates a 2.39% chance of exploitation in the next 30 days.

Description

A flaw was found in the Linux kernel's ksmbd, a high-performance in-kernel SMB server. The specific flaw exists within the processing of SMB2_SESSION_SETUP and SMB2_LOGOFF commands. The issue results from the lack of proper locking when performing operations on an object. An attacker can leverage this vulnerability to execute code in the context of the kernel.

Metrics

CVSS 3.1

8.1/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

2.39%

81.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	>= 5.15, < 5.15.145
Linux	Linux Kernel	>= 5.16, < 6.1.29
Linux	Linux Kernel	>= 6.2, < 6.2.16
Linux	Linux Kernel	>= 6.3, < 6.3.2
Netapp	Solidfire \& Hci Storage Node	All versions
Netapp	H300s	All versions
Netapp	H410s	All versions
Netapp	H500s	All versions
Netapp	H700s	All versions

References

https://access.redhat.com/security/cve/CVE-2023-32257Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2219806Issue Tracking, Patch, Third Party Advisory
https://security.netapp.com/advisory/ntap-20230915-0011/Third Party Advisory, VDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-CAN-20596/Patch, Third Party Advisory, VDB Entry
https://access.redhat.com/security/cve/CVE-2023-32257Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2219806Issue Tracking, Patch, Third Party Advisory
https://security.netapp.com/advisory/ntap-20230915-0011/Third Party Advisory, VDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-CAN-20596/Patch, Third Party Advisory, VDB Entry

Timeline

Published: Jul 24, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-32257?

How severe is CVE-2023-32257?

CVE-2023-32257 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 2.39% probability of exploitation in the next 30 days.

How do I fix CVE-2023-32257?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-32257?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST